python - 我应该在Python dicts上使用'has_key（）'或'in'吗？(Should I use 'has_key()' or 'in' on Python dicts?)

Question

I wonder what is better to do:

(我想知道做什么更好：)

d = {'a': 1, 'b': 2}
'a' in d
True

or:

(要么：)

d = {'a': 1, 'b': 2}
d.has_key('a')
True

  ask by igorgue translate from so

Answer 1

in is definitely more pythonic.

(in绝对是pythonic。)

In fact has_key() was removed in Python 3.x .

(事实上， 在Python 3.x中删除了has_key() 。)